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Error code reference

Amana Range Error Code F26

Oven temperature runaway.

Amana codesAmana range codes

Oven temperature runaway.

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What F26 means on a Amana range

The F26 error code on an Amana range indicates an oven temperature runaway condition. This fault is triggered when the oven control board detects that the oven cavity temperature is rising beyond acceptable limits or is not responding correctly to the control signals sent to the bake or broil elements. Essentially, the system senses that the oven is heating in an uncontrolled manner, either climbing too high without shutting off or behaving erratically relative to the set temperature target.

The primary components involved in this fault are the oven temperature sensor (RTD probe), the electronic oven control board, and the relay that governs power delivery to the heating elements. If the temperature sensor is sending an inaccurate reading, the control board may believe the oven is cooler than it actually is and continue supplying power to the element past a safe threshold. A welded or stuck relay on the control board can also cause continuous heating regardless of the board's output signal.

Common triggers include a failed or out-of-calibration oven temperature sensor, a shorted or faulty control board relay, or a defective oven control board itself. Wiring harness issues between the sensor and the board can also contribute by introducing false resistance readings. Because this error involves uncontrolled heating, it should be treated as a safety concern and the range should not be operated until the root cause is identified and corrected.

Source: manufacturer service documentation.

Common causes of F26

  1. 01

    Faulty oven temperature sensor

    Part replacement

    The oven temperature sensor (RTD probe) may be sending incorrect resistance readings to the control board, causing the board to misread the actual oven temperature and allow overheating. A properly functioning sensor typically reads around 1100 ohms at room temperature, and values significantly outside that range indicate a failed sensor.

  2. 02

    Stuck or welded relay on the control board

    Part replacement

    If a relay on the oven control board becomes welded in the closed position, power will continue flowing to the heating element even after the board signals it to stop. This results in uncontrolled heating and triggers the F26 fault.

  3. 03

    Defective oven control board

    Part replacement

    The electronic control board itself may have failed internally, causing it to misinterpret sensor signals or improperly manage element cycling. If the sensor and wiring check out correctly, the control board is the likely culprit.

  4. 04

    Damaged or loose wiring harness

    Wiring / connection

    Loose connections or damaged wiring between the temperature sensor and the control board can introduce false resistance readings, leading the board to incorrectly assess oven temperature. Inspect the harness and connectors at both the sensor and board ends for signs of burning, corrosion, or disconnection.

  5. 05

    Heating element short circuit

    Part replacement

    A bake or broil element that has shorted can draw continuous power regardless of control board signals, contributing to runaway heating. Visually inspect the elements for cracks, blistering, or burn marks, and test for shorts with a multimeter.

See the test procedure for each cause

Frequently asked questions about F26

What does F26 mean on a Amana range?
The F26 code on an Amana range means the control system has detected an oven temperature runaway condition. This indicates the oven was heating beyond acceptable limits or was not responding correctly to control signals. It is a safety-related fault that typically points to a failed temperature sensor, a stuck relay on the control board, or the control board itself.
Is it safe to use my Amana range when the F26 error is displayed?
No, it is not safe to continue using the range while the F26 error is active. This code indicates uncontrolled oven heating, which is a fire and safety hazard. The oven should be disabled and unplugged until the faulty component is diagnosed and replaced.
Will resetting the Amana range clear the F26 error code?
Resetting the range by disconnecting it from power for a few minutes may temporarily clear the F26 code, but if the underlying fault remains, the error will return once the oven begins heating again. A reset does not fix the root cause, so a proper component diagnosis is still required.
How do I fix the F26 error on my Amana range?
Start by testing the oven temperature sensor for correct resistance values and inspecting the wiring harness for damage or loose connections. If the sensor is within spec and the wiring is intact, the control board or its relays are the next components to evaluate. Depending on the failed part, repair involves replacing the temperature sensor, the control board, or the heating element.
How much does it cost to repair an Amana range with an F26 error?
Repair costs vary depending on the failed component. An oven temperature sensor replacement typically runs in the range of $20 to $80 for the part, while a control board can cost anywhere from $100 to $300 or more. Adding professional labor charges will increase the total, generally bringing full repair costs to somewhere between $150 and $450 depending on the diagnosis.

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